diff --git a/core/model/extensions/Sort.js b/core/model/extensions/Sort.js
index 138014a99..c28e34199 100644
--- a/core/model/extensions/Sort.js
+++ b/core/model/extensions/Sort.js
@@ -59,7 +59,7 @@ define([
 					}
 				}
 				if(bs){
-					sortSpec = sortSpec.concat(bs);
+					sortSpec = bs.concat(sortSpec);
 				}
 			}else{
 				sortSpec = bs;